Wilhelm g



(No Model.)

W. GKA. H'EISER. SMOKE OONSUMING FURNACE.

No. 304,428. Patented Sept. 2, 1884.

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ATTORNEYS.

PETERS Flwlo-Uhngraphcr. washin -mu. ov a INILHELM G. A. HEISER, OF BERLIN, GERMANY.

SMOKE-CONSUMING FURNACE.

[JPECIFICATION forming part of Letters Patent No. 304,428, dated September 2, 183%.

Application filed July 9, 1883. (No model.) Patented in England November 2, 1882, No.5,239; in Belgium December I5. 1882, No. 59,638; in Austria-Hungary February 6, 1883, No. 37.324 and No. 3.40); in France February 12, 1883, No. 1:31.957. and in Germany June 12, 18323, No. 22.505, and July 28, 18823, No. 23,216.

I all whom it may concern:

Be it known that I, \VILHELM G. A. HEISER,

of the city of Berlin, Kingdom of Prussia,

German Empire, have invented certain new and useful Improvements in Smoke-0onsum ing Furnaces, (for which Letters Patent have heretofore been granted to me by the government of Germany, N 0. 2,986V, dated February 18, 1883; France, N o. 139, 7 26; Great Britain, provisional protection, No: 5,239,and Belgium No. 59,638B,) of which the following is a specification.

This invention has reference to improvements in smoke-consuming furnaces for steamboilers and other purposes, in which the fuel is utilized in a higher degree by coking it before conducting it into the combustionchamber proper; and the invention consists, essentially, of one or more coking-chambers arranged transversely to or parallel to the combustion-chambers, from which the fuel is conducted along an inclined grate extending from the coking-chamber to ahorizontal grate in the combustionchamber, the coking-chambers being separated from the combustionchamber by aseparating-wall extending down ward from the top. The air necessary for combustion is conducted to the furnace through suitable air-channels above the grate. The separating-wall of the coking-chamber is provided at its inner surface, facing the cokingchamber, with vertical ribs or projections by which the passage of the gases from the coking-chamber to the combustioirchainber is facilitated.

In the accompanying drawings, Figures 1 and 2 represent, respectively, a vertical longitudinal and a vertical section of the simplest form of my improved furnace. Figs. 3 and 4 rep-' resent vertical longitudinal sections of the same, showing different relative dispositions of the inclined feeding-grate to the separatingwall of the coking-chamber. Figs. 5 and 6 are vertical longitudinal sections of my improved furnace with transverse coking-chambers and air-supply channels. 7

Similar letters of reference indicate corresp ondipg parts.

In all the different applications of my improved furnace the same principle is shown, to wit, the principle of coking the fuel before the same is conducted to the main grate of the furnace.

In the simplest form of my improved fursize is formed to admit the free passage ofthe fuel. The separating-wall Ois made of greater or less depth, according to the quality of the fuel employed, as shown in Figs. 1, 3, and 4. In most cases, however, the construction of the proportion shown in Fig. 1 and 2 will be preferred. XVhen the fire on the main grate a is properly started, and the coking-chamber B and the inclined grate a are properly charged with fuel, it is obvious that as soon as the fuel on the main grate a is burning briskly,the brightness of the burning fuel gradually decreases 011 the inclined grate a, while at a point near the lower edge of the separatingwall 0 it has only a dull red color, and developes, consequently,considerablyless heat. By the brisk fire in the furnace A, anintenseheat is developed, by which the separating-wall O is heated up in its entire length, so that it transmits its heat by radiation to the fuel in the coking-chamber B. The gases which are generated by the fuel in the cokingchamber do not possess the required high temperature to be ignited, and are drawn in downward fdi.- rection around. the lower edge of the separating-wall G into the combustion chamber, as shown by the arrows in Figs. 1 and 3. The gases thus generated have to pass, consequently, on their way to the combustion-chamber, along the inner surface of the separating-wall G and above the layer of fuel at the upper part of 'the inclined grate, whereby their temper rture is increased sothat perfect combustion can take place when a proper quantity of atmospheric air is supplied, which air is drawn through the openings between the main-grate bars and through the fuel on the inclined grate. The surface of the separatingwall G, facing the coking-chamber B, is provided with vertical ribs or projections r, against which the fuel abuts, so that the gases are compelled to pass in the channels formed between the ribs in downward direction, and below the lower edge of the separatingwall O to the combustion-chamber proper. These ribs or projections may be of triangular, rectangular, or any other suitable cross-section, but have to be arranged in all cases at the inner surface of the separating-wall, as shown clearly in Figs. 1, 2, 3, and 4. The atmospheric air is conducted to the fuel above the main grate by means of a series of channels, 5 b, which con1- mnnicate with a larger channel, 0, in which the air is heated up by the heat radiated by the fire and the walls of the combustion-chamher, as shown in Figs. 5 and 6. The channel Of is located above in the arched crown of the eombustion-chamber, and connected at its opposite end with an opening in the front wall of the furnace, the channel being provided at this point with a slide or register for regulating the supply of air.

One or more coking-chambers B may be an ranged, which may be either at right angles or parallel to the aXis of the combustion-chamber,according to the disposition of the furnace. Fig. 5 shows a Cornwall boiler in which. two coking-chambers B, and consequently two inclined grates a a are arranged. The cokingchambers are in this case arranged transverse ly to the longitudinal axis of the boiler.

In Fig. 6 a (ornwall boiler is shown with l one coking-chamber B only, which is arranged transversely to the aXis of the same. The supply of air by the channel 0' and the openings 6 takes place in the same manner as in Fig. 5.

My improved system of coking fuel before the same is supplied to and entirelyburned on the grate is also applicable to malt-kilns, drying-chambers, locomotives, and portable boilers and other purposes. Besides the more effective utilization of the fuel ,myimproved system has the advantage that the clinkers are disposed of in an easier manner, inasmuch as' the grates on which the clinkers are formed are readily accessible without interrupting the coking process in the chambers B.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. As an improvement in smoke-consuming furnaces, the combination of the combustion-.

chamber A, one or more coking-chambers, B, and separatingwall G, provided with vertical ribs or projections at the surface facing the coliingchamloer,whereby the passing off of the generated gases to the combustion-chamber is facilitated, substantially as described.

2. The'combination of the combustioirchamher A, coking-chamber B, separating-wall 0, having vertical ribs at the surface facing the coking chamber, inclined grate to, extending from the coking-chamber in downward direction, and main grate (d of the combustion-chamber, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.

WVILHELM G. A. HEISER. Witnesses:

IIUGO W'iLoss, l5. tor. 

